10111001021220 has 48 divisors (see below), whose sum is σ = 30884512212288. Its totient is φ = 2451151762560.

The previous prime is 10111001021203. The next prime is 10111001021237. The reversal of 10111001021220 is 2212010011101.

It is an interprime number because it is at equal distance from previous prime (10111001021203) and next prime (10111001021237).

It is a super-2 number, since 2×10111001021220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10111001021196 and 10111001021205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7659848599 + ... + 7659849918.

It is an arithmetic number, because the mean of its divisors is an integer number (643427337756).

Almost surely, 2^{10111001021220} is an apocalyptic number.

10111001021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111001021220 is an abundant number, since it is smaller than the sum of its proper divisors (20773511191068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10111001021220 is a wasteful number, since it uses less digits than its factorization.

10111001021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15319698540 (or 15319698538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111001021220 its reverse (2212010011101), we get a palindrome (12323011032321).

The spelling of 10111001021220 in words is "ten trillion, one hundred eleven billion, one million, twenty-one thousand, two hundred twenty".