1201212102021 has 16 divisors (see below), whose sum is σ = 1702865501568. Its totient is φ = 750574310400.

The previous prime is 1201212102017. The next prime is 1201212102023. The reversal of 1201212102021 is 1202012121021.

It is not a de Polignac number, because 1201212102021 - 2² = 1201212102017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201212102023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48853225 + ... + 48877806.

It is an arithmetic number, because the mean of its divisors is an integer number (106429093848).

Almost surely, 2^{1201212102021} is an apocalyptic number.

It is an amenable number.

1201212102021 is a deficient number, since it is larger than the sum of its proper divisors (501653399547).

1201212102021 is a wasteful number, since it uses less digits than its factorization.

1201212102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97731292.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201212102021 its reverse (1202012121021), we get a palindrome (2403224223042).

The spelling of 1201212102021 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred two thousand, twenty-one".