10221001001220 has 96 divisors (see below), whose sum is σ = 28653228672768. Its totient is φ = 2722323082752.

The previous prime is 10221001001209. The next prime is 10221001001279. The reversal of 10221001001220 is 2210010012201.

It is a super-2 number, since 2×10221001001220² (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 = 10221001001196 and 10221001001205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248986737 + ... + 249027783.

It is an arithmetic number, because the mean of its divisors is an integer number (298471132008).

Almost surely, 2^{10221001001220} is an apocalyptic number.

10221001001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221001001220 is an abundant number, since it is smaller than the sum of its proper divisors (18432227671548).

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

10221001001220 is a wasteful number, since it uses less digits than its factorization.

10221001001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45949 (or 45947 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10221001001220 its reverse (2210010012201), we get a palindrome (12431011013421).

The spelling of 10221001001220 in words is "ten trillion, two hundred twenty-one billion, one million, one thousand, two hundred twenty".