1011211212402 has 96 divisors (see below), whose sum is σ = 2415370950720. Its totient is φ = 316167883200.

The previous prime is 1011211212343. The next prime is 1011211212409. The reversal of 1011211212402 is 2042121121101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1011211212409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 390508 + ... + 1474760.

It is an arithmetic number, because the mean of its divisors is an integer number (25160114070).

Almost surely, 2^{1011211212402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011211212402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207685475360).

1011211212402 is an abundant number, since it is smaller than the sum of its proper divisors (1404159738318).

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

1011211212402 is a wasteful number, since it uses less digits than its factorization.

1011211212402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084390 (or 1084378 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1011211212402 its reverse (2042121121101), we get a palindrome (3053332333503).

The spelling of 1011211212402 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twelve thousand, four hundred two".