20212020099 has 16 divisors (see below), whose sum is σ = 29948275840. Its totient is φ = 13472636040.

The previous prime is 20212020091. The next prime is 20212020113. The reversal of 20212020099 is 99002021202.

It is not a de Polignac number, because 20212020099 - 2³ = 20212020091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212020091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136464 + ... + 242994.

It is an arithmetic number, because the mean of its divisors is an integer number (1871767240).

Almost surely, 2^20212020099 is an apocalyptic number.

20212020099 is a deficient number, since it is larger than the sum of its proper divisors (9736255741).

20212020099 is a wasteful number, since it uses less digits than its factorization.

20212020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113567 (or 113561 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 20212020099 in words is "twenty billion, two hundred twelve million, twenty thousand, ninety-nine".