2001121020102 has 32 divisors (see below), whose sum is σ = 4046481027072. Its totient is φ = 659700314784.

The previous prime is 2001121020097. The next prime is 2001121020109. The reversal of 2001121020102 is 2010201211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001121020109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3900628 + ... + 4383735.

It is an arithmetic number, because the mean of its divisors is an integer number (126452532096).

Almost surely, 2^{2001121020102} is an apocalyptic number.

2001121020102 is an abundant number, since it is smaller than the sum of its proper divisors (2045360006970).

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

2001121020102 is a wasteful number, since it uses less digits than its factorization.

2001121020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8284812.

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

Adding to 2001121020102 its reverse (2010201211002), we get a palindrome (4011322231104).

The spelling of 2001121020102 in words is "two trillion, one billion, one hundred twenty-one million, twenty thousand, one hundred two".