22021220001021 has 8 divisors (see below), whose sum is σ = 31088781177984. Its totient is φ = 13817236079040.

The previous prime is 22021220001017. The next prime is 22021220001037. The reversal of 22021220001021 is 12010002212022.

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

It is not a de Polignac number, because 22021220001021 - 2² = 22021220001017 is a prime.

It is a super-4 number, since 4×22021220001021⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021220101021) 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, 215894313685 + ... + 215894313786.

It is an arithmetic number, because the mean of its divisors is an integer number (3886097647248).

Almost surely, 2^{22021220001021} is an apocalyptic number.

It is an amenable number.

22021220001021 is a deficient number, since it is larger than the sum of its proper divisors (9067561176963).

22021220001021 is a wasteful number, since it uses less digits than its factorization.

22021220001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431788627491.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22021220001021 its reverse (12010002212022), we get a palindrome (34031222213043).

The spelling of 22021220001021 in words is "twenty-two trillion, twenty-one billion, two hundred twenty million, one thousand, twenty-one".