101221001012010 has 128 divisors (see below), whose sum is σ = 266659232716800. Its totient is φ = 24386200070400.

The previous prime is 101221001011981. The next prime is 101221001012029. The reversal of 101221001012010 is 10210100122101.

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, 894524916 + ... + 894638064.

It is an arithmetic number, because the mean of its divisors is an integer number (2083275255600).

Almost surely, 2^{101221001012010} is an apocalyptic number.

101221001012010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 101221001012010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133329616358400).

101221001012010 is an abundant number, since it is smaller than the sum of its proper divisors (165438231704790).

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

101221001012010 is a wasteful number, since it uses less digits than its factorization.

101221001012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129964.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101221001012010 its reverse (10210100122101), we get a palindrome (111431101134111).

The spelling of 101221001012010 in words is "one hundred one trillion, two hundred twenty-one billion, one million, twelve thousand, ten".