201220002102021 has 32 divisors (see below), whose sum is σ = 311200190020608. Its totient is φ = 113265676339200.

The previous prime is 201220002101983. The next prime is 201220002102023. The reversal of 201220002102021 is 120201200022102.

It is not a de Polignac number, because 201220002102021 - 2⁶ = 201220002101957 is a prime.

It is a super-3 number, since 3×201220002102021³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220002102023) 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, 172130946 + ... + 173295996.

It is an arithmetic number, because the mean of its divisors is an integer number (9725005938144).

Almost surely, 2^{201220002102021} is an apocalyptic number.

201220002102021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201220002102021 is a deficient number, since it is larger than the sum of its proper divisors (109980187918587).

201220002102021 is a wasteful number, since it uses less digits than its factorization.

201220002102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287881.

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

Adding to 201220002102021 its reverse (120201200022102), we get a palindrome (321421202124123).

The spelling of 201220002102021 in words is "two hundred one trillion, two hundred twenty billion, two million, one hundred two thousand, twenty-one".