201001210021021 has 8 divisors (see below), whose sum is σ = 202054209283584. Its totient is φ = 199948217393280.

The previous prime is 201001210020983. The next prime is 201001210021057. The reversal of 201001210021021 is 120120012100102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201001210021021 - 2¹⁹ = 201001209496733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201001210020992 and 201001210021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001270021021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66380766 + ... + 69342688.

It is an arithmetic number, because the mean of its divisors is an integer number (25256776160448).

Almost surely, 2^{201001210021021} is an apocalyptic number.

It is an amenable number.

201001210021021 is a deficient number, since it is larger than the sum of its proper divisors (1052999262563).

201001210021021 is a wasteful number, since it uses less digits than its factorization.

201001210021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317411.

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

Adding to 201001210021021 its reverse (120120012100102), we get a palindrome (321121222121123).

The spelling of 201001210021021 in words is "two hundred one trillion, one billion, two hundred ten million, twenty-one thousand, twenty-one".