10212011121220 has 24 divisors (see below), whose sum is σ = 21472966237464. Its totient is φ = 4079520089856.

The previous prime is 10212011121181. The next prime is 10212011121239. The reversal of 10212011121220 is 2212111021201.

It can be written as a sum of positive squares in 4 ways, for example, as 5558000704 + 10206453120516 = 74552^2 + 3194754^2 .

It is a super-2 number, since 2×10212011121220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10212011121194 and 10212011121203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330256569 + ... + 330287488.

It is an arithmetic number, because the mean of its divisors is an integer number (894706926561).

Almost surely, 2^{10212011121220} is an apocalyptic number.

10212011121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212011121220 is an abundant number, since it is smaller than the sum of its proper divisors (11260955116244).

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

10212011121220 is a wasteful number, since it uses less digits than its factorization.

10212011121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660544839 (or 660544837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10212011121220 its reverse (2212111021201), we get a palindrome (12424122142421).

The spelling of 10212011121220 in words is "ten trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, two hundred twenty".