2121001200122 has 48 divisors (see below), whose sum is σ = 3832348545000. Its totient is φ = 876784656384.

The previous prime is 2121001200121. The next prime is 2121001200133. The reversal of 2121001200122 is 2210021001212.

It can be written as a sum of positive squares in 4 ways, for example, as 2101893943681 + 19107256441 = 1449791^2 + 138229^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2121001200097 and 2121001200106.

It is not an unprimeable number, because it can be changed into a prime (2121001200121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2497754 + ... + 3237402.

Almost surely, 2^{2121001200122} is an apocalyptic number.

2121001200122 is a deficient number, since it is larger than the sum of its proper divisors (1711347344878).

2121001200122 is a wasteful number, since it uses less digits than its factorization.

2121001200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740703 (or 740696 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121001200122 its reverse (2210021001212), we get a palindrome (4331022201334).

The spelling of 2121001200122 in words is "two trillion, one hundred twenty-one billion, one million, two hundred thousand, one hundred twenty-two".