11211420725 has 24 divisors (see below), whose sum is σ = 15270123840. Its totient is φ = 8127630720.

The previous prime is 11211420721. The next prime is 11211420743. The reversal of 11211420725 is 52702411211.

It is not a de Polignac number, because 11211420725 - 2² = 11211420721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211420694 and 11211420703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211420721) 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, 502184 + ... + 524033.

It is an arithmetic number, because the mean of its divisors is an integer number (636255160).

Almost surely, 2^11211420725 is an apocalyptic number.

It is an amenable number.

11211420725 is a deficient number, since it is larger than the sum of its proper divisors (4058703115).

11211420725 is a wasteful number, since it uses less digits than its factorization.

11211420725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026269 (or 1026264 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 11211420725 its reverse (52702411211), we get a palindrome (63913831936).

The spelling of 11211420725 in words is "eleven billion, two hundred eleven million, four hundred twenty thousand, seven hundred twenty-five".