2101121001002 has 4 divisors (see below), whose sum is σ = 3151681501506. Its totient is φ = 1050560500500.

The previous prime is 2101121000989. The next prime is 2101121001037. The reversal of 2101121001002 is 2001001211012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1443628683121 + 657492317881 = 1201511^2 + 810859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525280250249 + ... + 525280250252.

Almost surely, 2^{2101121001002} is an apocalyptic number.

2101121001002 is a deficient number, since it is larger than the sum of its proper divisors (1050560500504).

2101121001002 is a wasteful number, since it uses less digits than its factorization.

2101121001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050560500503.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2101121001002 its reverse (2001001211012), we get a palindrome (4102122212014).

The spelling of 2101121001002 in words is "two trillion, one hundred one billion, one hundred twenty-one million, one thousand, two".