101220121002 has 128 divisors (see below), whose sum is σ = 279154649088. Its totient is φ = 23612601600.

The previous prime is 101220120961. The next prime is 101220121019. The reversal of 101220121002 is 200121022101.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5524 + ... + 449967.

It is an arithmetic number, because the mean of its divisors is an integer number (2180895696).

Almost surely, 2^101220121002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101220121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139577324544).

101220121002 is an abundant number, since it is smaller than the sum of its proper divisors (177934528086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101220121002 is a wasteful number, since it uses less digits than its factorization.

101220121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455564.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101220121002 its reverse (200121022101), we get a palindrome (301341143103).

It can be divided in two parts, 1012201 and 21002, that added together give a triangular number (1033203 = T₁₄₃₇).

The spelling of 101220121002 in words is "one hundred one billion, two hundred twenty million, one hundred twenty-one thousand, two".