1211403210402 has 96 divisors (see below), whose sum is σ = 3077870806080. Its totient is φ = 314313592320.

The previous prime is 1211403210343. The next prime is 1211403210419. The reversal of 1211403210402 is 2040123041121.

It is a super-3 number, since 3×1211403210402³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2830374 + ... + 3230142.

It is an arithmetic number, because the mean of its divisors is an integer number (32061154230).

Almost surely, 2^{1211403210402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211403210402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538935403040).

1211403210402 is an abundant number, since it is smaller than the sum of its proper divisors (1866467595678).

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

1211403210402 is a wasteful number, since it uses less digits than its factorization.

1211403210402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400736 (or 400729 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211403210402 its reverse (2040123041121), we get a palindrome (3251526251523).

The spelling of 1211403210402 in words is "one trillion, two hundred eleven billion, four hundred three million, two hundred ten thousand, four hundred two".