1210201011021 has 64 divisors (see below), whose sum is σ = 1728735641600. Its totient is φ = 751670150400.

The previous prime is 1210201011017. The next prime is 1210201011043. The reversal of 1210201011021 is 1201101020121.

It is not a de Polignac number, because 1210201011021 - 2² = 1210201011017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210201010988 and 1210201011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210201010021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 344686656 + ... + 344690166.

It is an arithmetic number, because the mean of its divisors is an integer number (27011494400).

Almost surely, 2^{1210201011021} is an apocalyptic number.

It is an amenable number.

1210201011021 is a deficient number, since it is larger than the sum of its proper divisors (518534630579).

1210201011021 is a wasteful number, since it uses less digits than its factorization.

1210201011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610.

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

Adding to 1210201011021 its reverse (1201101020121), we get a palindrome (2411302031142).

The spelling of 1210201011021 in words is "one trillion, two hundred ten billion, two hundred one million, eleven thousand, twenty-one".