212020001121021 has 16 divisors (see below), whose sum is σ = 282897301800960. Its totient is φ = 141244690228400.

The previous prime is 212020001121011. The next prime is 212020001121029. The reversal of 212020001121021 is 120121100020212.

It is a cyclic number.

It is not a de Polignac number, because 212020001121021 - 2⁴⁷ = 71282512765693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020001121029) 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, 136709710 + ... + 138251888.

It is an arithmetic number, because the mean of its divisors is an integer number (17681081362560).

Almost surely, 2^{212020001121021} is an apocalyptic number.

It is an amenable number.

212020001121021 is a deficient number, since it is larger than the sum of its proper divisors (70877300679939).

212020001121021 is a wasteful number, since it uses less digits than its factorization.

212020001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575216.

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

Adding to 212020001121021 its reverse (120121100020212), we get a palindrome (332141101141233).

The spelling of 212020001121021 in words is "two hundred twelve trillion, twenty billion, one million, one hundred twenty-one thousand, twenty-one".