1202121101000 has 64 divisors (see below), whose sum is σ = 2813272890480. Its totient is φ = 480795532800.

The previous prime is 1202121100987. The next prime is 1202121101003. The reversal of 1202121101000 is 1011212021.

It can be written as a sum of positive squares in 8 ways, for example, as 299495696644 + 902625404356 = 547262^2 + 950066^2 .

It is not an unprimeable number, because it can be changed into a prime (1202121101003) 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, 9755774 + ... + 9878226.

Almost surely, 2^{1202121101000} is an apocalyptic number.

1202121101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202121101000 is an abundant number, since it is smaller than the sum of its proper divisors (1611151789480).

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

1202121101000 is a wasteful number, since it uses less digits than its factorization.

1202121101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132291 (or 132277 counting only the distinct ones).

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

Adding to 1202121101000 its reverse (1011212021), we get a palindrome (1203132313021).

The spelling of 1202121101000 in words is "one trillion, two hundred two billion, one hundred twenty-one million, one hundred one thousand".