102000212021 has 4 divisors (see below), whose sum is σ = 106435003872. Its totient is φ = 97565420172.

The previous prime is 102000211993. The next prime is 102000212101. The reversal of 102000212021 is 120212000201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120212000201 = 19 ⋅6326947379.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102000212021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102000211993 and 102000212011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000212221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2217395891 + ... + 2217395936.

It is an arithmetic number, because the mean of its divisors is an integer number (26608750968).

Almost surely, 2^102000212021 is an apocalyptic number.

It is an amenable number.

102000212021 is a deficient number, since it is larger than the sum of its proper divisors (4434791851).

102000212021 is an equidigital number, since it uses as much as digits as its factorization.

102000212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434791850.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102000212021 its reverse (120212000201), we get a palindrome (222212212222).

The spelling of 102000212021 in words is "one hundred two billion, two hundred twelve thousand, twenty-one".