90021212001 has 32 divisors (see below), whose sum is σ = 152472641280. Its totient is φ = 51421868928.

The previous prime is 90021211991. The next prime is 90021212003. The reversal of 90021212001 is 10021212009.

It is not a de Polignac number, because 90021212001 - 2¹⁴ = 90021195617 is a prime.

It is a super-2 number, since 2×90021212001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90021212003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439095 + ... + 610611.

It is an arithmetic number, because the mean of its divisors is an integer number (4764770040).

Almost surely, 2^90021212001 is an apocalyptic number.

It is an amenable number.

90021212001 is a deficient number, since it is larger than the sum of its proper divisors (62451429279).

90021212001 is a wasteful number, since it uses less digits than its factorization.

90021212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174310 (or 174304 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 90021212001 in words is "ninety billion, twenty-one million, two hundred twelve thousand, one".