20101021102 has 16 divisors (see below), whose sum is σ = 31961436192. Its totient is φ = 9448552960.

The previous prime is 20101021099. The next prime is 20101021103. The reversal of 20101021102 is 20112010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101021103) 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, 305578 + ... + 365485.

It is an arithmetic number, because the mean of its divisors is an integer number (1997589762).

Almost surely, 2^20101021102 is an apocalyptic number.

20101021102 is a deficient number, since it is larger than the sum of its proper divisors (11860415090).

20101021102 is a wasteful number, since it uses less digits than its factorization.

20101021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671963.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101021102 its reverse (20112010102), we get a palindrome (40213031204).

The spelling of 20101021102 in words is "twenty billion, one hundred one million, twenty-one thousand, one hundred two".