221012000101021 has 4 divisors (see below), whose sum is σ = 221013495604000. Its totient is φ = 221010504598044.

The previous prime is 221012000100961. The next prime is 221012000101177. The reversal of 221012000101021 is 120101000210122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221012000101021 - 2³⁹ = 220462244287133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221012000100992 and 221012000101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012000102021) 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, 747529791 + ... + 747825388.

It is an arithmetic number, because the mean of its divisors is an integer number (55253373901000).

Almost surely, 2^{221012000101021} is an apocalyptic number.

It is an amenable number.

221012000101021 is a deficient number, since it is larger than the sum of its proper divisors (1495502979).

221012000101021 is a wasteful number, since it uses less digits than its factorization.

221012000101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495502978.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221012000101021 its reverse (120101000210122), we get a palindrome (341113000311143).

The spelling of 221012000101021 in words is "two hundred twenty-one trillion, twelve billion, one hundred one thousand, twenty-one".