10211211121220 has 24 divisors (see below), whose sum is σ = 21443833603584. Its totient is φ = 4084429162976.

The previous prime is 10211211121217. The next prime is 10211211121249. The reversal of 10211211121220 is 2212111211201.

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, 1924262 + ... + 4911741.

It is an arithmetic number, because the mean of its divisors is an integer number (893493066816).

Almost surely, 2^{10211211121220} is an apocalyptic number.

10211211121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211211121220 is an abundant number, since it is smaller than the sum of its proper divisors (11232622482364).

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

10211211121220 is a wasteful number, since it uses less digits than its factorization.

10211211121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910699 (or 6910697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10211211121220 its reverse (2212111211201), we get a palindrome (12423322332421).

The spelling of 10211211121220 in words is "ten trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".