20120220101021 has 4 divisors (see below), whose sum is σ = 20120576400000. Its totient is φ = 20119863802044.

The previous prime is 20120220100987. The next prime is 20120220101029. The reversal of 20120220101021 is 12010102202102.

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 a de Polignac number, because none of the positive numbers 2^k-20120220101021 is a prime.

It is a super-3 number, since 3×20120220101021³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120220100987 and 20120220101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120220101029) 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, 178064771 + ... + 178177728.

It is an arithmetic number, because the mean of its divisors is an integer number (5030144100000).

Almost surely, 2^{20120220101021} is an apocalyptic number.

It is an amenable number.

20120220101021 is a deficient number, since it is larger than the sum of its proper divisors (356298979).

20120220101021 is an equidigital number, since it uses as much as digits as its factorization.

20120220101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356298978.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120220101021 its reverse (12010102202102), we get a palindrome (32130322303123).

The spelling of 20120220101021 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, one hundred one thousand, twenty-one".